Laserfiche WebLink
L � <br /> L December 7,2005 <br /> NOA Project Number: E05141B <br /> ` 7.0 CONCLUSIONS <br /> L In summary, satisfactory percolation rates of the soil were achieved in the proposed septic disposal <br /> areas of the Site. The project is suitable for development provided the following additional steps are <br /> taken to minimize potential nitrate impacts to the ground water due to fairly high nitrate levels <br /> Lmeasured in the water sample. / <br /> Utilize standard filter bed septic system design as described by the EHD with the <br /> • following modifications: <br /> • Minimum Septic Tank Sizes / <br /> L 2 bedroom—1200 <br /> 3 bedroom— 1600 <br /> 4 bedroom—2000 ,d• <br /> 5 bedroom—2400 r� C <br /> 6 bedroom homes and above will require consultation. Sys J� <br /> L Apply 4 inches of loose compost or peat in the bottom of the filter bed. Utilize / <br /> gravel drain systems rather than gravelless drain products to improve denitrification. <br /> • The San Joaquin County Environmental Health Department's publication "Onsite <br /> Wastewater Disposal Standards" dated 2003,be used to site and size new septic <br /> systems. <br /> i <br /> it <br /> • The Environmental Health Department may impose additional requirements. <br /> No ground water was encountered in any of the borings drilled on the property. The on-site water <br /> well was tested for nitrate and DBCP. DBCP was non-detectable, and nitrate concentration in <br /> �. ground water was found tq bg 61-:7:Q mg/L-NO3,which is above the maximum contaminant <br /> dunking water limit of 45 mWL--No3. We recommend the well not be use for drinking water since _the water quality test indices levels of Nitrate above the MCL for drinking water. We recommend <br /> L discussing well repair options for elevated nitrate with EHD. f <br /> v <br /> 11 <br /> w <br /> L <br />